UNDERELLA BY ELLA MOSS

Andrea Lavinthal, Style and Beauty Director: According to all those "30 Things Every Woman Should Have by the Time She's 30" lists, I'm a failure at adulthood because I don't own a sexy lingerie set (and I turned 30 I'm-not-telling-you-how-many years ago). But that's about to change, since I'm treating myself to this red silk bralette and undies combo (check out the other colorways here) in honor of the movie. Better late than never, right? Buy It! Ella Moss "Audrey" bralette, amazon.com, $20, and bikini, amazon.com, $22

TRUE & CO

Catherine Kast, Style Writer: I love longline bras because the extended band provides slightly more sleek-ifying coverage on the upper abs area, but feels really formal. True amp Co's bra (and matching thong) is delicate and does double-duty: It gives you two outfits in one! First, wear it under a high-waisted skirt and a white button down. Since the bra is unlined, it won't add bulk, but it will add lacy intrigue to a classic look. Then, when you take off said button-down, you can try your hand at Taylor Swift's go- to ladylike crop-top-and-skirt combo, without having to hit the street in it.Buy It! True amp Co "Bardot" longline bra trueandco.com, $48, and panty trueandco.com, $16

SAMANTHA CHANG

Brittany Talarico, Style News Editor: My husband already refuses to see Fifty Shades of Grey with me, so we won't be one of those couples waiting in line for tickets. But I'm using Valentine's Day as an excuse to buy this black lace bodysuit I've had my eye on. No, I won't be wearing it with pasties à la Miley Cyrus; instead, I think it would be really cute under skinny jeans with a button down over it, so just a little hint peeks through. Buy It! Samantha Chang "Cencia" bodysuit, anthropologie.com, $108

VICTORIA'S SECRET

Sarah Kinonen, Editorial Assistant: While I may not be a big fan of the Fifty Shades of Grey book series, you better believe I plan on seeing the film in this Victoria's Secret bustier set – under my clothes. Since the plot is a little bit scandalous, why can't I be, too? I may never wear anything like this ever again in my life (ask me again on my wedding day), but for a risqué movie like Fifty, it sure is fun to play along.Buy It! Victoria's Secret tulle lace bustier, victoriassecret.com, $328

ADORE ME

Alex Apatoff, Senior Style Editor: Yes, I need more pretty underthings, but considering there's no way in hell I'm seeing Fifty Shades of Grey in theaters, my lingerie pick had to do double duty for my Netflix couch session in seven months. Enter this comfy-but-cute bralette set from Adore Me, which will be perfect when I inevitably fall asleep a third of the way through.Buy It! Adore Me "Delores" unlined set, adoreme.com, $49.95

COSABELLA

Jackie Fields, Beauty Writer: This is not your average red underwear set. These intimates actually glow! Yes, you read that right. They're glow-in-the-dark. But before you go throwing them on (not that you would be so lackadaisical on Valentine's Day), some instruction: these babies have to be "charged" under an ultraviolet, fluorescent or natural light for at least 15 minutes before you'll have a bona fide "party in your pants." Once "baked", they'll light up your bedroom for at least 8 minutes … but let's be honest, you'll probably have them off long before then. Buy It! Cosabella "Glow Bra" cosabella.com, $101, and "Glow Hotpants" cosabella.com, $58.50